the potentiometer is working fine because it will go from 0 to 4 ma and if i test it with L on the power supply i get 0 to 30+ Ma
Great... BUT note what I also said earlier: As we know you did some weird wiring in the beginning, you'd need a multimeter to test that your BlackBox is working fine too If the BlackBox didn't pick up damage from the incorrect wiring - also remember you pumped 10v into a 5v input on the laser PSU - maybe you damaged your H input.